3.5-1=-1/2(-7x+2)

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Solution for 3.5-1=-1/2(-7x+2) equation: 


x in (-oo:+oo)

3.5-1 = (-1/2)*(2-7*x) // - (-1/2)*(2-7*x)

3.5-((-1/2)*(2-7*x))-1 = 0

(1/2)*(2-7*x)-1+3.5 = 0

1/2*(2-7*x)-1+3.5 = 0

1/2*(2-7*x)-1+3.5 = 0

3.5-7/2*x = 0

3.5-7/2*x = 0

3.5-7/2*x = 0 // - 3.5

-7/2*x = -3.5 // : -7/2

x = -3.5/(-7/2)

x = 1

x = 1

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